A 5-year research program, the Research Institute on the Placement and Integration of Children with Severe Disabilities, was conducted to survey current definitions and placement patterns involving large representative samples of children 3 to 21 years old with severe disabilities. Twenty variables, including characteristics of students, families, teachers, administrators, and communities, were identified and analyzed to measure the extent to which each variable affects the probability that students are placed in an integrated or segregated facility. Research, development, and evaluation activities were then performed to increase the effectiveness of special education for children with severe disabilities in integrated settings. Technical assistance was provided to statewide systems change projects on the interventions most likely to promote integration. This report includes descriptions of project activities, including technical assistance, descriptive research, and developmental research, and provides abstracts of 12 research studies conducted. A substantial portion of the report is composed of tables documenting project accomplishments. Three separately published lists of closely-related resources are appended: (1) "Written Products from Activities of the CRI"; (2) "Collaborative and Integrated Related Services Resource Guide"; (3) "Least Restrictive Environment (LRE) Clearinghouse Resource Library." (JDD)